Web-severing device



June 26, 1923. 1,459,746

c. F. PFLANZE WEB SEVERING DEVICE Filed Dec. '17, 1919 2 Sheets-Sheetl June 26, 1923.

C. F. PFLANZE 2 Sheets-Sheet 2 I (Z fr /70029 J, W m

Patented June 2%, l

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Application filed December 17, 1919. Serial No. 345,505.

To all whom it may concern:

Be it known that 1, CHARLES F. PFLANZE,

a citizen of the United States of-America, a resident of the city of St. Louis, in the State of Missouri, have invented certain new and useful Improvements in Web-severing Devices, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in severing devices, and more particularly to a device adapted to sever a traveling web of material, such as paper or the like. One of 1 the objects of the invention is to provide a simple and positive severing means where by a. traveling web of paper may be accurately divided into uniform sheets or strips. The device herein shown may be used to sever long webs of diflerentkinds of'matei ial, and it is especially adapted for use in the manufacture of window envelopes hav-' ing transparent patches at the window openings. A traveling web of thin, transparent paper may be acted upon by the new device, so as to provide the small transparent patches;

With the foregoing and other objects in' view, the invention comprises the novel construction, combination and arrangement of parts hereinafter more specifically described and illustrated in the accompanying drawings wherein is shown the preferred embodiment of the invention. However, it is tobe understood that the invention comprehends changes, variations and modifications which come within the scope of the claims hereunto appended. I

Fig. I is a vertical section illustrating the to combined feeding and severing device. Fig. II is a View similar to Fig. 1 showing the parts in different posit ons. Fig. III is a front elevation of the device shown in Fig. I.

Fig. IV is a side elevation, on a small scale, showing-the drivmg mechan sm.

Fig. .V is a detail view of the roll provided with a blade for tightening the web of pa. 8!. I so Fig. V1 is a detail vlew'of the roll having tighten the paper on the serrated a severing blade onto which the paper is tightened.

In Figs. I and ILA designates a web'of paper which is to be cut into small sections A. To illustrate the invention it have t shown paper feeding rolls 1, 2 and 3, each fixed to a central shaft 4. Bearings 5 are slidably mounted in side frames 6 to receive the shafts 4 which extend from rolls 1 and 3. Springs 8, acting upon bearings 5, tend to W force the rolls 1 and 3 toward the rolls 2, and the traveling web of paper (Fig.1) is thus held at two separated points by the pressure of the two separated feeding rolls 1 and 3 on the periphery ofroll 2. All of these rolls as are driven simultaneously at the same peripheral' speed by means of .pinions 9 (Fig. I fixed to the shafts 4:, and a drive wheel 10 meshing with one of the pinions.

The severing device preferably comprises to severing blades 12 located -in longitudinal grooves 13 in'the roll 2, and'secured by means of screws, as shown in Fig. I. These severing blades 12 extend from diametrically opposite points on the periphery of roll 2, t5 and they are prefera 1y provided with straight serrated cutting edges (Fig. VI) which lie parallelwith the axis of the roll. Web-tightening blades 14 are mounted in longitudinal grooves in .the roll 3 and secured by means of screws (Fig. 1). Each of these web tightening bladesl: (Fig. V) preferably has a smooth, dull edge adapted to engage and tighten thev paper, and this dull edge is preferably inclined from the middle 35 to the ends of the blade,-so as to gradually edge of thesevering blade 12. Each roll 2--3 is rooved to receive the blade projecting from its companion roll, and the peripheral face of roll 1 is preferably mutilated, or cut away, to permit the severing blades 12 to pass freely under the roll 1 (Fig. H).

When the rollsoccupy the positions shown by Fig. 11, a severing blade 12 lies adjacent $5 to the roll 1, and springs 8 tend to force said roll 1 toward the roll 2, .but the springpressed bearin'gsb, in which said roll is mounted, then engage the bottom walls of the guideways. for the bearings, so the ice isprings will notforce the roll 1 onto the I severing blade 12. The peripheral portion of roll 1 is preferably formed by'a body of.

rubber, oblong in cross section, and hav- 1n op ositelydisposed concentric faces a apte to cooperate with roll 2 to feed the paper and to prevent slippage thereof dur-' that the traveling web of paper A-A' is firmlyheld at. two separated points, where or torn by the action of tightening blade 14,

it. contacts with the'rolls 1 and 3, and immediately before the severing operation the paper is bowed between these holding points so as to overlie and engage the sharp serrated edge of severing blade 12. Since'the paper is firmly held to prevent slippage on opposite sides of severing blade 12, said paper maybe'severed' if it is tightly drawn onto the edge of blade 12. This action is accomplished by the tightening blade 14, which moves transversely of the path of the paper and eventually enters groove 13, in which'blade 12 is mounted. Obviously, the paper which cannot slip will be either cut and since the paper is tightened on the sharp serrated edge of blade 12, it will be sitively severed at said edge. It may be interestingto observe that this positive severing device will properly perform its function eventhough the blades 12 and 13 are not accurately located in precise relative positions, and in this respect it differs from ordinary shearing devices, wherein two sharp blades cooperate with each other. In

an ordinary shear the two blades'must contact with each other in a particular manner, butin the new device herein disclosed the traveling web of paper is merely tightened on the sharp edge of a tra-velingsevering blade.

I claim:

1. In a device for feeding and severing a traveling web of paper, a rotary severing blade movable with the traveling web,'and a rotary tightening blade also movable with the traveling web, said blades being engaged with opposite sides of the traveling web so that the edge of the rotary tightening blade will intersect the path of said severing blade to tighten said web on the severing blade,

' projecting from the eriphery'of the othersaid tightening blade having a smooth edge engaging the web and said severing bladebeing provided with a serrated edge which engages the web. a

2. In a device for feeding and severing a web of paper, a'pair of feed rolls disposed on opposite sides of the paper, a severing blade projecting from the periphery of one of said feed rolls, and a web tightening blade feed roll, the edge 0 said tightening blade being arranged to intersect the path of said n severing blade,so as to tighten the web and force it onto sa-id severing blade.

other eed roll, the edge of said tightening blade being arran ed to intersect the path of said severing b ade, so as to tighten the web and force it onto said severing blade, .each of said rolls being recessed to receive the blade on the other roll.

4;. In a device for feeding and severing a web of paper,rotary rolls including oppositely disposed feed rolls whereby the web is fed and held to prevent slippage at two separated points, a severing blade extending from one of said rolls, and a web-ti htener extending from another of said rolls, said severing blade and web-tightener being disposed on opposite sides of the traveling web, and the edges of said blade and said web tightener being arranged to travel in intersecting paths so that the tightened web will beforced onto the severing'blade.

5. In a device for feeding and severing a web of paper, a group of rotary feed rolls whereby the web is fed and held to prevent slippage at two separated points, a severing .3. In a device for feeding and severing a blade rejecting from the periphery of the I ing vblade extending from the periphery of another of said rolls and ha-ving a. smooth edge adapted to engage'the web between said separated points, said blades being on opposite sides of the path of the traveling web and the edges of said blades being movable in intersecting paths so that the tightening blade, will force the tightened paper onto the serrated edge of the severing blade.

6. In a device for feeding and severing a traveling web of paper, feed rolls whereby the traveling web is held at separated points, a blade arranged to engage the traveling web between said separated oints, and a web-tightening member where y the web is tightened on the edge of said blade, said feed rolls including a rotary roll havin a peripheral face whereby the web is held at one of said points during the severing operation and released during the intervals between the severing operations.

7. In a device for feeding and severing a traveling web of paper, 'holding members whereby the traveling web is held at separated points, a blade arranged to engage the traveling web between said separated oints, and a web-tightening member where y the web is. tightened on the edge of said blade, said holding members including a feed roll having a non-circular peripheral face whereill till

intense by the traveling web is alternately held and released at one of said points.

8. In a device for severing a traveling web of paper, holding members whereby the traveling web is held at separated points. a severing blade adapted to engage and deflect the traveling web between said separated points, and a tightening blade cooperable with the first mentioned blade to tighten and sever the deflected web between said points, said holding members including feed rolls whereby the traveling web is held while the blades cooperate with each other and released to permit free deflection of the web and said severing blade bein extended from the periphery of one of said feed rolls to separate a portion of said web from said periphery.

9. In a device for severing a traveling web of paper, holding members whereby the traveling web is held at separated points, a blade adapted to engage and deflect the travcling web between said separated points, and a blade cooperable with the first mentioned blade to tighten and sever the deflected web between said points, said holding members includin feed rolls, one of which is provided with a non-circular peripheral face, whereby the traveling web is held while the blades cooperate with each other and released to permit free deflection of the web.

10. In a device for severing a travellng web of paper, rotary feed rolls whereby the traveling web is held at separated pomts, a severing blade adapted to engage and defleet the traveling web from the periphery of one of the feed rolls at a point between said separated points, and a blade cooperable with the first mentioned blade to tighten and sever the deflected web between said separated points, the edges of said blades being movable in intersecting paths, and said rotary -feed rolls being provided w th webengaging faces whereby the traveling web is alternately released and held at one of said points.

11. In a device for severing a traveling web of paper, rotary feed rolls whereby the traveling web is held at separated points, a

blade adapted to engage and deflect the travelin web between said separated points, and a blade cooperable with the first mentioned blade to tighten and sever the deflected web between said points, said blades being movable in intersecting paths, and one of said rotary feed rolls being provided with a non-circular peripheral faoe whereby the traveling web is held while the blades cooperate with each other and released to pernnt free deflection of the web. 7

12'. lln a device for severing a traveling web of paper, three rotary feed rolls, one of said teed rolls having a peripheral lace cooperating with the peripheries of the other two feed rolls to grip and feed the web at two separated points, and severing elements projecting beyond the peripheries of two of said rolls to sever the web bet-ween said points.

13. In a device for severing a traveling web of paper. three rotary feed rolls. one of said feed rolls having a peripheral face 00- operating with the peripheries of the other two feed rolls to grip and feed the web at two separated points. a blade projecting beyond the periphery of one of said rolls to engage and deflect the traveling web be tween said points, and a blade projecting beyond the periphery of another of said rolls and cooperating with the first mentioned blade to tighten and sever the web between said points.

14. In a device for severing a traveling web of paper, three rotary feed rolls, one of said feed rolls having a peripheral face cooperatin with the peripheries of the other two fee rolls to grip and feed the web at two separated points, a blade projecting beyond the periphery of one of said rolls to engage and deflect the traveling web between said points, and a blade projecting beyond the periphery of another of said rolls and cooperating with the first mentioned blade to tighten and sever the web between said points. said blades being movable in intersecting paths, and one of said rolls having a non-circular peripheral face whereby the web is alternately held and released.

15. In a device for severing a traveling web of paper, three rotary teed rolls, one of said feed rolls having a peripheral face cooperating with the peripheries of the other two feed rolls to grip and feed the web at two separated points, a blade projecting beyond the periphery of one of said rolls to engage and deflect the traveling web between said points, and a blade projecting beyond the periphery of another of said rolls and cooperating with the firstmentioned blade to tighten and sever the web between said points. the res ctive blades being secured to two of said ro' is, and the other roll having a non-circular peripheral face permitting rotation of one of said blades.

16. In a device for feeding and severing a traveling web of paper, holding members whereby the traveling web is held at separated points. a blade arranged "to engage the travehng web between said separated points, and a web-tightening member whereby the web is tightened on the edge of said blade, said holding members including rotary teed polls cooperating with each other to hold the paper at said separated points, said blade being secured to and carried by one of said feed rolls and said web-tightening member being secured to and carried by another of said feed rolls.

17. In a device for severing a traveling web of paper, holding members whereby the lib v traveling web is held at separated points, a separated. points, said severing blade being blade adapted to engage and deflect the travsecured to and carried by one of said feed- 10 eling web between said separated points, and rolls, and said tightening blade being sea blade cooperable with the first mentioned cured to and carried by another of said feed I blade to tighten and sever the deflected web rolls.

between said p0ints,'said holding members In testimony that I claim the foregoing I including a rotary feed rolls cooperating hereunto aflix my signature. with each other to hold the paper at said CHARLES F. PFLANZE. 

